Method of Manufacturing a Polypropylene Pinch Bag

Abstract

An improved belt-clip holder for various objects is disclosed. The holder may be of unitary construction and includes a belt-clip for securely attaching the holder to a user's belt or other suitable item. The unitary construction reduces the cost and complexity of the holder. The holder has front, back and side panels to hold and protect an object, such as a dipping tobacco tin, or a group of objects, such as a group of credit cards. The holder also may have bottom panels in some embodiments. A retainer, having an integral retaining lip, secures the held object or objects in the holder. A cavity formed by the lower edges of the front, back, and side panels, allows a user to push a held object upward in order to remove the object from the holder. The retainer is configured so that a user my disengage the integral retaining lip using the same hand used to push the held object upward via the cavity. In this manner, the holder allows for the secure retention of an object within the holder, and also for easy, single-handed, removal of the object by a user when such removal is desired.

1 . A method of forming a tube for forming a pinch bag from a polypropylene sheet having a width, a length and edges comprising;
 a. perforating said polypropylene sheet along a pre-selected line;   b. folding said polypropylene sheet so that said edges overlap;   c. adhering said edges together; and   d. applying a force to a terminal section of said polypropylene sheet sufficient to break said perforation and thereby separate said terminal section from said polypropylene sheet.   
     
     
         2 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 1  wherein said polypropylene sheet is formed by laminating a polypropylene matrix to a solid layer of polypropylene. 
     
     
         3 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 2  wherein said matrix comprises a weave. 
     
     
         4 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 3  wherein said weave comprises axially oriented polypropylene strands. 
     
     
         5 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 4  wherein said solid layer comprises biaxially oriented polypropylene. 
     
     
         6 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 1  wherein said sheet is sufficiently perforated to allow said perforation to be broken upon the application of between about eight to about eighteen pounds of force per inch of width of said polypropylene sheet. 
     
     
         7 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 6  wherein said polypropylene sheet comprises axially oriented polypropylene fibers. 
     
     
         8 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 7  wherein said perforation is performed with a laser. 
     
     
         9 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 8  wherein said laser forms a series of closely spaced perforations along said pre-selected line. 
     
     
         10 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 9  wherein said laser heats an area of said polypropylene sheet surrounding said each said perforation sufficiently to cause said axially oriented polypropylene fibers in said area to become substantially randomly oriented. 
     
     
         11 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 10  wherein said perforations are spaced sufficiently close so that substantially all of said pre-selected line comprises either perforation or substantially randomly oriented polypropylene. 
     
     
         12 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 11  wherein said polypropylene sheet further comprises biaxially oriented polypropylene. 
     
     
         13 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 12  wherein said axially oriented polypropylene fibers are provided in a matrix. 
     
     
         14 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 13  wherein said matrix is a weave. 
     
     
         15 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 1  wherein said polypropylene sheet consists essentially of polypropylene. 
     
     
         16 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 1  wherein adhesive is applied to said edges in parallel strips. 
     
     
         17 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 16  wherein said parallel strips are separated by at least about one half of an inch. 
     
     
         18 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 17  wherein said edges are positioned one on top of the other, thereby creating an upper edge and a lower edge. 
     
     
         19 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 18  wherein said upper edge contains a first perforation between said parallel strips and wherein said lower edge contains a second perforation between said parallel strips and wherein said first perforation and second perforation do not overlap. 
     
     
         20 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 18  wherein said first perforation and said second perforation are offset by at least about one foot. 
     
     
         21 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 1  wherein said edges are positioned one on top of the other, thereby creating an upper edge and a lower edge. 
     
     
         22 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 21  wherein adhesive is applied to said lower edge in at least a first layer and a second layer. 
     
     
         23 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 22  wherein each layer of adhesive is applied in a swirl pattern. 
     
     
         24 . A method of forming a tube for forming a pinch bag from a polypropylene sheet according to  claim 23  wherein said first layer of adhesive is applied directly to said lower edge and said second layer of adhesive is applied onto said first layer of adhesive.